21214036536454 has 8 divisors (see below), whose sum is σ = 31904138499840. Its totient is φ = 10579323703176.

The previous prime is 21214036536449. The next prime is 21214036536487. The reversal of 21214036536454 is 45463563041212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13847281569 + ... + 13847283100.

It is an arithmetic number, because the mean of its divisors is an integer number (3988017312480).

Almost surely, 2^{21214036536454} is an apocalyptic number.

21214036536454 is a deficient number, since it is larger than the sum of its proper divisors (10690101963386).

21214036536454 is a wasteful number, since it uses less digits than its factorization.

21214036536454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27694565054.

The product of its (nonzero) digits is 2073600, while the sum is 46.

Adding to 21214036536454 its reverse (45463563041212), we get a palindrome (66677599577666).

The spelling of 21214036536454 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred fifty-four".